公开(公告)号：US12199502B2

公开(公告)日：2025-01-14

申请号：US18311478

申请日：2023-05-03

Applicant: L3Harris Technologies, Inc.

Inventor： Alexander N. Smith ,  Lixin Tang ,  Uzzal Islam

IPC: H02M1/36 ,  H02M1/00 ,  H02M1/08

Abstract: A method of applying three-phase power to a transformer having limbs including a first limb, a second limb, and a third limb respectively wound with primary windings that include a first winding, a second winding, and a third winding, includes: generating alternating current (AC) voltages (AC voltages) including a first AC voltage, a second AC voltage, and a third AC voltage; initially not applying the AC voltages to the primary windings; monitoring a relative voltage between the first AC voltage and the second AC voltage; and based on results of monitoring, implementing a power-on sequence of sequentially applying various ones of the AC voltages to corresponding ones of the primary windings until all of the AC voltages are applied to all of the primary windings in a manner that balances flux across the limbs during and after the power-on sequence.

公开(公告)号：US12267007B1

公开(公告)日：2025-04-01

申请号：US18526276

申请日：2023-12-01

Applicant: L3Harris Technologies, Inc.

Inventor： Lixin Tang

IPC: G01R35/00 ,  H02M3/04

Abstract: An apparatus comprises: a first power source to generate first voltages; a power switch to supply the first voltages to a load as load voltages or not supply the first voltages to the load; first sensors to sense first sensed voltages based on the first voltages, and load sensors to sense the load voltages to produce sensed load voltages; and a controller to: upon detecting a failure of the first sensors, identify a faulty sensed voltage of the first sensed voltages caused by the failure based on at least the first sensed voltages and whether the power switch supplies or does not supply the first voltages to the load; compute a reconstructed sensed voltage to replace the faulty sensed voltage based on healthy sensed voltages of the first sensed voltages that are not faulty; and monitor the healthy sensed voltages and the reconstructed sensed voltage.